diff --git a/README.md b/README.md
index 1f8fea5..4013b93 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,8 @@ to each cluster to permit a limited or broader distribution scheme.
 - [elements/certainty-level.json](elements/certainty-level.json) - Certainty level of an associated element or cluster.
 - [elements/planning-and-operational-support-vocabulary.json](elements/planning-and-operational-support-vocabulary.json) - The PlanningAndOperationalSupportVocab is the default STIX vocabulary for expressing the planning and operational support functions available to a threat actor.
 - [elements/threat-actor-motivation-vocabulary.json](elements/threat-actor-motivation-vocabulary.json) - The MotivationVocab is the default STIX vocabulary for expressing the motivation of a threat actor. STIX 1.2.1
+- [elements/threat-actor-sophistication-vocabulary.json](elements/threat-actor-sophistication-vocabulary.json) - The ThreatActorSophisticationVocab enumeration is used to define the default STIX vocabulary for expressing the subjective level of sophistication of a threat actor.
+- [elements/threat-actor-type-vocabulary.json](elements/threat-actor-type-vocabulary.json) - The ThreatActorTypeVocab enumeration is used to define the default STIX vocabulary for expressing the subjective type of a threat actor.
 - [elements/threat-actor-intended-effect-vocabulary.json](elements/threat-actor-intended-effect-vocabulary.json) - The IntendedEffectVocab is the default STIX vocabulary for expressing the intended effect of a threat actor. STIX 1.2.1
 
 ## How to contribute?